Energy Units

Btu [ BTU ]

Btu is the abbreviation of the British thermal unit. It is a traditional unit of energy equal to about 1055 joules.

Calorie [15 °C] [ cal15 ]

Calorie [ 15 °C] is a unit of energy that the amount of energy required to warm on gram of air-free water from 14.5 °C to 15.5 °C at standard atmospheric presure (1 cal [15°C] = 4.1855 J).

Calorie [I.T.] [ calit ]

Calorie is a pre-SI metric unit of energy, symbol "cal". Calorie [i.t.] is an International Stream Table calorie equal to 4.1868 joules.

Calorie [nutritional] [ calnutritional ]

Calorie [nutritional] is a unit of energy in food.

Calorie [thermochemical] [ calth ]

Calorie [thermochemical] is a unit of energy use in thermochemistry.

Dekatherm [ dath ]

Dakatherm is a unit of energy eqal 10 therms, symbol "dath".

Electronvolt [ eV ]

Electronvolts (symbol eV; also written electron volt) is a unit of energy equal to approximately 1.602×10.19 joule.

Erg [ erg ]

Erg is a unit of energy and mechanical work in the the centimetre-gram-second (CGS) system of units, symbol "erg".

Exajoule [ EJ ]

Exajoule is a unit of energy equal to 1.0E+18 joules, symbol "EJ". This unit comes from a combination of metric-prefix "exa" and SI derived unit of energy "joule".

Femtojoule [ fJ ]

Femtojoule is a unit of energy equal to 1.0E-15 joules, symbol "fJ". This unit comes from a combination of metric-prefix "femto" and SI derived unit of energy "joule".

Foot pound [ ft-lb ]

Foot-pound or foot-pound force is a unit of energy in the Engineering and Gravitational System in United States customy and imperial unit of measure.

Gigajoule [ GJ ]

Gigajoule is a unit of energy equal to 1.0E+9 joules, symbol "GJ". This unit comes from a combination of metric-prefix "giga" and SI derived unit of energy "joule".

Gigawatt hour [ GWh ]

Gigawatt hour is a unit of energy equal to 1000 Megawatt hours, sysmbol "GWh". This unit comes form "giga" metric-prefix and "watt hour" unit of energy.

Gram calorie [ gcal ]

Gram calorie or small calorie (symbol: cal) approximates the energy needed to increase the temperature of 1 gram of water by 1 °C. This is about 4.2 joules.

Hartree [ Eh ]

The hartree is the atomic unit of energy, symbol (Eh or Ha).

Horsepower hour [ hph ]

Horsepower-hour (hph) is an outdated unit of energy, not used in the SI system of units.

Inch ounce [ in-oz ]

Inch ounce is a unit of energy equal to about 0.007061552 joule, symbol "in-oz".

Inch pound [ in-lb ]

Inch pound is a unit of energy equal to about 0.112984829 joules, symbol "in-lb".

Joule [ J ]

Joule is a derived unit of energy or work in the International System of Units, symbol "J".

Kilogram calorie [ Kgcal ]

kilogram calorie, dietary calorie, or food calorie (symbol: Cal) approximates the energy needed to increase the temperature of 1 kilogram of water by 1 °C. This is exactly 1,000 small calories or about 4.2 kilojoules.

Kilojoule [ kJ ]

Kilojoule is a unit of energy equal to 1000 joules, symbol "kJ". This unit comes from a combination of metric-prefix "kilo" and SI derived unit of energy "joule".

Kilowatt hour [ kWh ]

The kilowatt-hour (symbolized kWh) is a unit of energy equivalent to one kilowatt (1 kW) of power expended for one hour (1 h) of time.

Liter atmosphere [ l-atm ]

Liter atmosphere is a unit of energy, symbole "l-atm", equal to 101.32500 joules.

Megawatthour [ MWh ]

Microjoule [ µJ ]

Microjoule is a unit of energy equal to 1/1 000 000 joule, symbol "µJ". This unit comes from a combination of metric-prefix "micro" and SI derived unit of energy "joule".

Millijoule [ mJ ]

Millijoule is a unit of energy equal to 1/1 000 joule, symbol "mJ". This unit comes from a combination of metric-prefix "milli" and SI derived unit of energy "joule".

Nanojoule [ nJ ]

Nanojoule is a unit of energy equal to 1/1 000 000 000 joule, symbol "nJ". This unit comes from a combination of metric-prefix "nano" and SI derived unit of energy "joule".

Newton meter [ Nm ]

A newton metre is a unit of torque (also called "moment") in the SI system. The symbolic form is Nm or N·m. One newton metre is equal to the torque resulting from a force of one newton applied perpendicularly to a moment arm which is one metre long.

Petajoule [ PJ ]

Petajoule is a unit of energy equal to 1.0E+15 joules, symbol "PJ". This unit comes from a combination of metric-prefix "peta" and SI derived unit of energy "joule".

Picojoule [ pJ ]

Picojoule is a unit of energy equal to 1/1 000 000 000 000 joule, symbol "pJ". This unit comes from a combination of metric-prefix "pico" and SI derived unit of energy "joule".

Tonne of coal equivalent [ TCE ]

Tonne of oil equivalent [ TOE ]

A ton of oil equivalent (TOE) is, unit of energy, a conventional value, based on the amount of energy released by burning one tonne of crude oil, of 41.868 GJ, 11.63 MWh, 1.28 TCE, 39.68 million BTU, or 6.6 - 8.0 actual barrels of oil (depending on actual

Ton [explosive] [ texplosive ]

Ton [explosive] is a measure of energy.

Watthour [ Wh ]

Watthour (symbolized Wh) is a unit of energy equivalent to one watt (1 W) of power expended for one hour (1 h) of time.

Wattsecond [ Ws ]

Wattsecon (symbolized Ws) is a unit of energy equivalent to one watt (1 W) of power expended for one second (1 s) of time.